Re: New FW release: Bug solved: crash after boot when waterfall is enabled
It's in the Wiki. 73 -Jim NU0C On Thu, 12 Oct 2023 07:12:22 -0700 "Leif M" <leif.michaelsson@...> wrote: One? question: How to put SA? Ultra in? a DFU mode. I did not find that info anywhere.
|
Re: New FW release: Bug solved: crash after boot when waterfall is enabled
On 12/10/2023 15:12, Leif M wrote: One? question: How to put SA? Ultra in? a DFU mode. I did not find that info
anywhere. Depress the jog wheel while switching on. David -- SatSignal Software - Quality software for you Web: Email: davidtaylor@... Twitter: @gm8arv
|
Re: New FW release: Bug solved: crash after boot when waterfall is enabled
One? question: How to put SA? Ultra in? a DFU mode. I did not find that info anywhere.
|
Re: Ultra Calibration, Auto & Manual
The tinySA Ultra uses a much lower level calibration signal (approx -35dBm) Both global and frequency curve adjustments are available The adjustment per selected frequency (IN ... CURVE) modifies the internal correction curve (correction versus frequency). The INPUT LEVEL can be used to do a global level adjustment See the WiKi --
For more info on the tinySA go to https://tinysa.org/wiki/
|
Ultra Calibration, Auto & Manual
Question around calibration tasks.
Self tests are good.
After doing the auto-cal 100kHz-5.43GHz, the 30MHz signal shows up as -32.7dBm.
Is the 7.7dBm diff due to the supplied cable? Leave it as-is, or level adjust it back up to -25dBm ?
And when doing the manual level adjustment, is the adjustment per frequency selected (creating an adjustment map), or does the adjustment simply carry across the unit?
|
Re: New user #ultra, Problem with the Signal Generator
I think the other U29 output could go to U20, to get the DIRECT MODE. This is just speculation looking at the photo and block diagram, I haven't checked it in the circuit
|
Re: New user #ultra, Problem with the Signal Generator
I measured that on the control pin U5 is 0V if it works as Spectrum Analyzer. And if it works as a generator, there are 3V on the control pin regardless of whether we work in Cleanest Signal or Highest Accuracy mode. From U6, the 1.5GHz signal on pin 4 only comes out in cleanest signal mode.?
It seems to me that U5 switches the signal for U6 transmit/receive and rather this works correctly. Next to U5 is U29, which, regardless of the mode, is always controlled by a high 3V state, which directs the signal to U7. Under what conditions should the signal controlling U29 switch to 0V? The other output of U29 goes to R46 R3 R48 which looks like a attenuator and goes somewhere on the other side of the PCB. The output of R48 looks like it is shorted to ground, maybe through some inductor. Further I don't know where to go, because I don't know where this track goes out.?Please help, I want to fix it.
|
Re: Blowing the front end, TinySAUltra
On Wed, Oct 11, 2023 at 02:55 AM, Charlie N2MHS wrote:
Be mindful of that first attenuator's power rating vs what is the source power.
Yes. I forgot to mention that important piece.?
|
Re: Blowing the front end, TinySAUltra
Be mindful of that first attenuator's power rating vs what is the source power.
On Wednesday, October 11, 2023 at 01:52:15 AM EDT, Akai Moto via groups.io <akai.moto@...> wrote:
On Sat, Sep 16, 2023 at 07:43 AM, Mike wrote:
Exactly my thoughts Martin - well said. This is really a common sense resolved issue - a good selection of ready to hand attenuators, and always err on the side of caution.
50ohm terminator caps are good, when not in use.
|
Re: Blowing the front end, TinySAUltra
On Sat, Sep 16, 2023 at 07:43 AM, Mike wrote:
Exactly my thoughts Martin - well said. This is really a common sense resolved issue - a good selection of ready to hand attenuators, and always err on the side of caution.
50ohm terminator caps are good, when not in use.
|
Re: Blowing the front end, TinySAUltra
Hi all. I have several tiny devices, SA Ultra is my newest one. I just wanted to make some notes, perhaps corrections to some previous posts. G8HUL on page-1 is right. The spec sheet for SA Ultra does says "For best measurements keep input power below -25dBm". That's just 3.162uW. If power is 1W, you need around 55dB attenuator to get close to -25dBm, thus -60dB is good (1uW). Anything more than -25dBm and it's outside it's comfort zone. Someone posted "-20dB with my 1W". That's magnitudes more power than the SA wants to see. -60dB is easy, just buy a 20 & 40, so now you have three attenuators 20/40/60. Yeah, watch out for insertion losses.
|
Re: Playing with sig gen function today on a Wouxun UVD1 HT.
Or, with SPAN=0, even a Selective Level Meter (SLM). Anyone remember the HP3486C?
On Oct 10, 2023, at 1:54 PM, W0LEV <davearea51a@...> wrote:
Yes, the TinySA Ultra could legitimately be termed an RF DMM.
Dave - W?LEV
On Tue, Oct 10, 2023 at 7:17?PM Andy G0FTD via <punkbiscuit= [email protected]> wrote: I seem to use the sig gen function quite a lot with my Ultra.
Today I was toying with my old Wouxun UVD1 on the FM broadcast band.
The broadcast FM RX has always been a bit weird, but usable, but nothing special.
I learnt that I could get exactly -100dbm of MDS out of it before the the rx died, at 108Mhz.
Even 1 db below was unusable, much like the typical sensitivity of other RX's.
But the difference here was the absolute cliff edge when a signal was below -100dbm.
Other rx's are still a cliff edge, but hell the UVD1 was so absolute.
Below that the audio was so terrible as to be awful.
Sent for info only, just appreciating the Ultra's sig gen function.
Messeed around with other HT's in my collection.
For example my Yaesu VX7R on HF was about -100dbm also.
As is my Tecsun PL880. But at least it as some AGC, unlike the VX7R.
I very much appreciate the sig gen function on the Tiny SA Ultra.
73 de Andy
--
|
Re: Playing with sig gen function today on a Wouxun UVD1 HT.
Yes, the TinySA Ultra could legitimately be termed an RF DMM.
Dave - W?LEV
On Tue, Oct 10, 2023 at 7:17?PM Andy G0FTD via <punkbiscuit= [email protected]> wrote: I seem to use the sig gen function quite a lot with my Ultra.
Today I was toying with my old Wouxun UVD1 on the FM broadcast band.
The broadcast FM RX has always been a bit weird, but usable, but nothing special.
I learnt that I could get exactly -100dbm of MDS out of it before the the rx died, at 108Mhz.
Even 1 db below was unusable, much like the typical sensitivity of other RX's.
But the difference here was the absolute cliff edge when a signal was below -100dbm.
Other rx's are still a cliff edge, but hell the UVD1 was so absolute.
Below that the audio was so terrible as to be awful.
Sent for info only, just appreciating the Ultra's sig gen function.
Messeed around with other HT's in my collection.
For example my Yaesu VX7R on HF was about -100dbm also.
As is my Tecsun PL880. But at least it as some AGC, unlike the VX7R.
I very much appreciate the sig gen function on the Tiny SA Ultra.
73 de Andy
|
Re: Old 300 MHz gate opener
Those things generally use OOK (On/Off Keying) and are rather broadband by nature.? The modulation looks about like I would expect.? The output is variable due to the fact that it is held in your hand and the proximity of your hand to the antenna detunes the antenna.? You might use a non-metallic tweaker (ceramic, if you have one), and tune for greatest signal strength at the distance you usually open the gate.? Or you might use the trial and error method for best range.? Unless you currently have a problem with the range of the device, Sam Reaves' advice to use the "If it's not broken, don't fix it" method might be the best.? I say that having a fair bit of professional experience with handheld and bodyworn RF devices.? You usually wind up doing at least some trial and error.
|
Playing with sig gen function today on a Wouxun UVD1 HT.
I seem to use the sig gen function quite a lot with my Ultra.
Today I was toying with my old Wouxun UVD1 on the FM broadcast band.
The broadcast FM RX has always been a bit weird, but usable, but nothing special.
I learnt that I could get exactly -100dbm of MDS out of it before the the rx died, at 108Mhz.
Even 1 db below was unusable, much like the typical sensitivity of other RX's.
But the difference here was the absolute cliff edge when a signal was below -100dbm.
Other rx's are still a cliff edge, but hell the UVD1 was so absolute.
Below that the audio was so terrible as to be awful.
Sent for info only, just appreciating the Ultra's sig gen function.
Messeed around with other HT's in my collection.
For example my Yaesu VX7R on HF was about -100dbm also.
As is my Tecsun PL880. But at least it as some AGC, unlike the VX7R.
I very much appreciate the sig gen function on the Tiny SA Ultra.
73 de Andy
|
Re: How to focus TinySA onto a narrower band
You can adjust the RF frequency so that the center axis of the 3k wide peak matches the desired frequency :)
|
Re: Old 300 MHz gate opener
On Tue, Oct 10, 2023 at 03:50 AM, Andrea I2UEA wrote:
HI, I have just repaired an old 300 MHz gate opener and now it works quite well: I can easily see its signal on my TinySA Ultra. Some questions:
- How can I adjust its capacitive trimmer in order to optimize its output signal? As you can see it¡¯s very variable due to its kind of modulation
- Is there a way to check its signal/modulation?
Set the tinySA to FREQUENCY/ZERO SPAN (effectively creating a fixed frequency power meter) at the wanted frequency and tune the trimmer for maximum output level Reduce the RBW a factor 10 and tune again Do this again a factor 10 If this works well I welcome a YouTube video demonstrating this. ? --
For more info on the tinySA go to https://tinysa.org/wiki/
|
Re: How to focus TinySA onto a narrower band
On Tue, Oct 10, 2023 at 08:22 AM, DrZWave wrote:
Is there a setting or some way to get a very narrow peak reading? I tried playing with all sorts of options using the APP - RBW and pints per scan but this is about as clean as I can get.
Can the cmd line do better? Or some other options? I need the reading to be pretty quick (a few seconds) so I can't sample for a long time and average or anything like that.
As per spec the minimum RBW is 3 kHz so the peak can never be less wide. You can increase scanning speed with reduced level accuracy for a very small span by setting DISPLAY/SCANNING ACCURACY/FAST and? SPEEDUP to 5 or 10 and by reducing the number of display points ? --
For more info on the tinySA go to https://tinysa.org/wiki/
|
How to focus TinySA onto a narrower band
I'm trying to use TinySA to check the RF characteristics during manufacturing of Z-Wave devices which use the 900MHz band. The device can output a pure tone at 908.42MHz which my agilent N9912 SA produces a very narrow bandwidth signal and the marker is clearly right at the peak. But the TinySA has a much wider and specifically a flat topped peak and thus the marker bounces around a lot making it harder to tweak the RF. The DUT is outputting a 908.42MHZ carrier out an antenna and the 2 SAs are next to the DUT on my desk. Agilent:
 TinySA:  Is there a setting or some way to get a very narrow peak reading? I tried playing with all sorts of options using the APP - RBW and pints per scan but this is about as clean as I can get. Can the cmd line do better? Or some other options? I need the reading to be pretty quick (a few seconds) so I can't sample for a long time and average or anything like that. TIA, Eric
|
Re: Old 300 MHz gate opener
Perhaps you should use?the "If it's not broken, don't fix it" method.
Sam W3OHM
Sam Reaves
ARS W3OHM
Owner / Moderator of: LeCroy Owners Group on Groups.io
Sencore Owners Group on Groups.io Sprint Layout Group on Groups.io?? Pulsonix EDA Group on Groups.io
LPKF Owners Group on Groups.io
Electronics and Mechanical Hardware Design Engineering Manager
Staff Scientist Andritz Rolls Global Research Center (RETIRED)
HI, I have just repaired an old 300 MHz gate opener and now it works quite well: I can easily see its signal on my TinySA Ultra. Some questions:
- How can I adjust its capacitive trimmer in order to optimize its output signal? As you can see it¡¯s very variable due to its kind of modulation
  
- Is there a way to check its signal/modulation?
Many thanks.
|
Jim Shorney
David J Taylor
Charlie N2MHS
Jim Allyn - N7JA
DrZWave
Sam Reaves